(under subclass 327) Apparatus in which the cutter element or cutting edge is carried on a bit which has a portion extending inwardly towards the axis of the bit and forwardly of the cutter element or cutting edge in the direction of boring and which has no cutting function.
(1) Note. The noncutting portion can be located between claimed cutting portions and patents which claim cutting portions spaced longitudinally of the bore axis will be classified in this subclass even though no noncutting portion is specifically recited.
SEE OR SEARCH THIS CLASS, SUBCLASS:
295, for a device having a noncutting portion forwardly of a sleeve impact member having a cutting portion thereon.
311, for receptacle suspended below a bit.
344+, for a bit having a noncutting portion forwardly of a cutting portion and in which the cutting portion is a rolling cutter.
385+, for bits having a leading or pilot portion forming a smaller diameter bore ahead of a trailing larger diameter cutting portion. 401, for reamers having additional upwardly directed cutting edges.
404, for a bit having a noncutting portion forwardly of a cutting portion, and in which the cutting portion is positioned within a core bit and functions as a core breaking means.
